Definition of concave in English:

concave

adjective ˈkɒnkeɪv

Having an outline or surface that curves inwards like the interior of a circle or sphere.
（轮廓，表面）凹的。比较 CONVEX （义项1）
concave lenses
Compare with convex (sense 1)
Example sentencesExamples
- McElwee contrasts convex and concave forms with building recesses and relief carvings.
- Depressions are concave regions on protein surfaces that have no constriction at the mouth.
- This is a small group of specialized ellesmerocerids with a concave outline of siphuncle segments.
- Its profile may show anything from a rather gentle concave upward curve to a series of complex scarps and sediment-filled basins.
- As the enamel shrinks on melting and cools with a concave surface, more has to be poured in and the process repeated.
- You stand in a dark room looking at a round concave surface perhaps five feet in diameter.
- Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism.
- The articular surface itself is concave, not convex as in many chelonioids.
- The human shoulder blade is a thin triangle of bone with a thick crest along one edge, and a shallow, concave joint surface in one corner.
- Choose only firm tubers and look for those with tiny sprouts showing on their upper, concave surfaces.
- The first surface of the head support arm is concave and the second surface of the head support arm is convex.
- Pictures of bound feet show the toes bent right under the sole, which is so curved it is concave.
- The exterior walls were composed of concave and convex red bricks.
- Where the old car had concave surfaces on the doors, the new doors swell outwards, lending more bulk to the profile.
- Above it, to signal the presence of occupied space, is a shallow concave circle dug out of the ground.
- The shape of each is similar, with a slightly concave surface, a rolled rim, and a high foot ring.
- You maintain your lower back curve, which is concave, by sitting straight in your chair.
- It is possible to see the outline of a concave façade and shallow forecourt.
- If the outside edges appear to get sanded first, yet the middle part isn't affected, then you have a concave surface.
- Galileo's telescope had a convex object lens but a concave eye-piece.
Synonyms
curved inwards, hollow, hollowed out, scooped out, depressed, sunken
indented, recessed
rare incurved, incurvate

Derivatives

concavely

adverb

The smooth external surface of the axial rings of the anterior seven segments in the thorax of S. pronus suggests that the thorax could be flexed strongly both concavely and convexly.
Example sentencesExamples
- The cranidium in lateral view clearly shows the sutural edge, curving gently concavely inwards laterally, and despite breakage of the left fixed cheek, appears to show that the suture bisects the genal prolongation.
- It's one of the many walls at the park made of ice that curves concavely.
- It is also possible to model the mould concavely, but such modelling in reverse is difficult and is seldom done except when very simple architectural ornament is being prepared.
- This piece is a horizontal red rectangular form, with wavering edges and a top edge that curves in concavely.

Origin

Late Middle English: from Latin concavus, from con- 'together' + cavus 'hollow'.

cave from Middle English:
Latin cavus, ‘hollow’, is the origin of a number of English words, including cave, cavern (Late Middle English), cavity (mid 16th century), and excavate (late 16th century). Concave (Late Middle English) is from cavus preceded by con ‘with’, while convex (late 16th century) is from the Latin for ‘vaulted, arched’. In the days when more people knew Latin, there was a second English word spelled cave. This one, pronounced kah-vay, meant ‘beware!’, and was used from the mid 19th century by schoolchildren to warn their friends that a teacher was coming.

Rhymes

behave, brave, Cave, clave, crave, Dave, deprave, engrave, enslave, fave, forgave, gave, grave, knave, lave, Maeve, misbehave, misgave, nave, outbrave, pave, rave, save, shave, shortwave, slave, stave, they've, waive, wave

Definition of concave in US English:

concave

adjective

Having an outline or surface that curves inward like the interior of a circle or sphere.
（轮廓，表面）凹的。比较 CONVEX （义项1）
concave lenses
Compare with convex (sense 1)
Example sentencesExamples
- The first surface of the head support arm is concave and the second surface of the head support arm is convex.
- As the enamel shrinks on melting and cools with a concave surface, more has to be poured in and the process repeated.
- You maintain your lower back curve, which is concave, by sitting straight in your chair.
- Depressions are concave regions on protein surfaces that have no constriction at the mouth.
- Where the old car had concave surfaces on the doors, the new doors swell outwards, lending more bulk to the profile.
- The human shoulder blade is a thin triangle of bone with a thick crest along one edge, and a shallow, concave joint surface in one corner.
- The exterior walls were composed of concave and convex red bricks.
- The articular surface itself is concave, not convex as in many chelonioids.
- It is possible to see the outline of a concave façade and shallow forecourt.
- The shape of each is similar, with a slightly concave surface, a rolled rim, and a high foot ring.
- Choose only firm tubers and look for those with tiny sprouts showing on their upper, concave surfaces.
- Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism.
- You stand in a dark room looking at a round concave surface perhaps five feet in diameter.
- This is a small group of specialized ellesmerocerids with a concave outline of siphuncle segments.
- Pictures of bound feet show the toes bent right under the sole, which is so curved it is concave.
- Galileo's telescope had a convex object lens but a concave eye-piece.
- Above it, to signal the presence of occupied space, is a shallow concave circle dug out of the ground.
- McElwee contrasts convex and concave forms with building recesses and relief carvings.
- If the outside edges appear to get sanded first, yet the middle part isn't affected, then you have a concave surface.
- Its profile may show anything from a rather gentle concave upward curve to a series of complex scarps and sediment-filled basins.
Synonyms
curved inwards, hollow, hollowed out, scooped out, depressed, sunken

Origin

Late Middle English: from Latin concavus, from con- ‘together’ + cavus ‘hollow’.

单词	concave
释义	Definition of concave in English: concave adjective ˈkɒnkeɪv Having an outline or surface that curves inwards like the interior of a circle or sphere. （轮廓，表面）凹的。比较 CONVEX （义项1） concave lenses Compare with convex (sense 1) Example sentencesExamples McElwee contrasts convex and concave forms with building recesses and relief carvings. Depressions are concave regions on protein surfaces that have no constriction at the mouth. This is a small group of specialized ellesmerocerids with a concave outline of siphuncle segments. Its profile may show anything from a rather gentle concave upward curve to a series of complex scarps and sediment-filled basins. As the enamel shrinks on melting and cools with a concave surface, more has to be poured in and the process repeated. You stand in a dark room looking at a round concave surface perhaps five feet in diameter. Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism. The articular surface itself is concave, not convex as in many chelonioids. The human shoulder blade is a thin triangle of bone with a thick crest along one edge, and a shallow, concave joint surface in one corner. Choose only firm tubers and look for those with tiny sprouts showing on their upper, concave surfaces. The first surface of the head support arm is concave and the second surface of the head support arm is convex. Pictures of bound feet show the toes bent right under the sole, which is so curved it is concave. The exterior walls were composed of concave and convex red bricks. Where the old car had concave surfaces on the doors, the new doors swell outwards, lending more bulk to the profile. Above it, to signal the presence of occupied space, is a shallow concave circle dug out of the ground. The shape of each is similar, with a slightly concave surface, a rolled rim, and a high foot ring. You maintain your lower back curve, which is concave, by sitting straight in your chair. It is possible to see the outline of a concave façade and shallow forecourt. If the outside edges appear to get sanded first, yet the middle part isn't affected, then you have a concave surface. Galileo's telescope had a convex object lens but a concave eye-piece. Synonyms curved inwards, hollow, hollowed out, scooped out, depressed, sunken indented, recessed rare incurved, incurvate Derivatives concavely adverb The smooth external surface of the axial rings of the anterior seven segments in the thorax of S. pronus suggests that the thorax could be flexed strongly both concavely and convexly. Example sentencesExamples The cranidium in lateral view clearly shows the sutural edge, curving gently concavely inwards laterally, and despite breakage of the left fixed cheek, appears to show that the suture bisects the genal prolongation. It's one of the many walls at the park made of ice that curves concavely. It is also possible to model the mould concavely, but such modelling in reverse is difficult and is seldom done except when very simple architectural ornament is being prepared. This piece is a horizontal red rectangular form, with wavering edges and a top edge that curves in concavely. Origin Late Middle English: from Latin concavus, from con- 'together' + cavus 'hollow'. cave from Middle English: Latin cavus, ‘hollow’, is the origin of a number of English words, including cave, cavern (Late Middle English), cavity (mid 16th century), and excavate (late 16th century). Concave (Late Middle English) is from cavus preceded by con ‘with’, while convex (late 16th century) is from the Latin for ‘vaulted, arched’. In the days when more people knew Latin, there was a second English word spelled cave. This one, pronounced kah-vay, meant ‘beware!’, and was used from the mid 19th century by schoolchildren to warn their friends that a teacher was coming. Rhymes behave, brave, Cave, clave, crave, Dave, deprave, engrave, enslave, fave, forgave, gave, grave, knave, lave, Maeve, misbehave, misgave, nave, outbrave, pave, rave, save, shave, shortwave, slave, stave, they've, waive, wave Definition of concave in US English: concave adjective Having an outline or surface that curves inward like the interior of a circle or sphere. （轮廓，表面）凹的。比较 CONVEX （义项1） concave lenses Compare with convex (sense 1) Example sentencesExamples The first surface of the head support arm is concave and the second surface of the head support arm is convex. As the enamel shrinks on melting and cools with a concave surface, more has to be poured in and the process repeated. You maintain your lower back curve, which is concave, by sitting straight in your chair. Depressions are concave regions on protein surfaces that have no constriction at the mouth. Where the old car had concave surfaces on the doors, the new doors swell outwards, lending more bulk to the profile. The human shoulder blade is a thin triangle of bone with a thick crest along one edge, and a shallow, concave joint surface in one corner. The exterior walls were composed of concave and convex red bricks. The articular surface itself is concave, not convex as in many chelonioids. It is possible to see the outline of a concave façade and shallow forecourt. The shape of each is similar, with a slightly concave surface, a rolled rim, and a high foot ring. Choose only firm tubers and look for those with tiny sprouts showing on their upper, concave surfaces. Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism. You stand in a dark room looking at a round concave surface perhaps five feet in diameter. This is a small group of specialized ellesmerocerids with a concave outline of siphuncle segments. Pictures of bound feet show the toes bent right under the sole, which is so curved it is concave. Galileo's telescope had a convex object lens but a concave eye-piece. Above it, to signal the presence of occupied space, is a shallow concave circle dug out of the ground. McElwee contrasts convex and concave forms with building recesses and relief carvings. If the outside edges appear to get sanded first, yet the middle part isn't affected, then you have a concave surface. Its profile may show anything from a rather gentle concave upward curve to a series of complex scarps and sediment-filled basins. Synonyms curved inwards, hollow, hollowed out, scooped out, depressed, sunken Origin Late Middle English: from Latin concavus, from con- ‘together’ + cavus ‘hollow’.
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